What is dark matter and dark energy and can they be contained?

Maybe it was a result of a long-discarded version of Einstein's theory of gravity, one that contained what was called a "cosmological constant." Maybe there was some .... Baryonic matter could still make up the dark matter if it were all tied up in brown dwarfs or in small, dense chunks of heavy elements. read more

”Neither dark energy or dark matter have ever been quality quantified in a laboratory on earth or in space. read more

Studies of other galaxies in the 1950s first indicated that the universe contained more matter than seen by the naked eye. read more

Dark Energy, Dark Matter In the early 1990s, one thing was fairly certain about the expansion of the universe. It might have enough energy density to stop its expansion and recollapse, it might have so little energy density that it would never stop expanding, but gravity was certain to slow the expansion as time went on. read more